Inverse spectral theory for semiclassical Jaynes-Cummings systems

Quantum semitoric systems form a large class of quantum Hamiltonian integrable systems with circular symmetry which has received great attention in the past decade. They include systems of high interest to physicists and mathematicians such as the Jaynes\--Cummings model (1963), which describes a two-level atom interacting with a quantized mode of an optical cavity, and more generally the so-called systems of Jaynes\--Cummings type. In this paper we consider the joint spectrum of a pair of commuting semiclassical operators forming a quantum integrable system of Jaynes\--Cummings type. We prove, assuming the Bohr\--Sommerfeld rules hold, that if the joint spectrum of two of these systems coincide up to $\mathcal{O}(\hbar^2)$, then the systems are isomorphic.